A force of magnitude F stretches a spring a distance of 2 cm from its rest position. What magnitude of force will stretch the spring an additional 4 cm?

4F

2F

3F

0.5F

3F

Step-by-step explanation:

Force = k * x

so k = force/distance = F/2

if you were to duplicate the distance 2 times more, the F must also do so so that it's proportional

so F*2 = 2F but since it says additional 4cm, you will need to add the initial one and this one so that it's 6cm in total.

2F + F = 3F